"rehab specialist" typically means someone who was previously a client of a treatment center, perhaps with or perhaps without a certificate in counseling. Sour

"rehab specialist" typically means someone who was previously a client of a treatment center, perhaps with or perhaps without a certificate in counseling. Source: my observations routinely interacting with numerous clients and employees (never a client nor employee myself) of more than a few treatment centers. An Addictionologist is an M.D. with a specialty in addiction who can speak to the matter on a scientific basis.